reduce some Directives exceptions down to error strings for perf

additionally, image operations that don't exist simply pass through now

assets/opensb/interface.config.patch

@@ -14,7 +14,9 @@
     "offset" : [0, 13]
   },
   "specialDamageBar" : {
-    "nameStyle" : {}
+    "nameStyle" : {
+      "fontSize" : 18
+    }
   },
   "textStyle" : {},
   "buttonTextStyle" : {

source/base/StarAssets.cpp

@@ -1160,7 +1160,10 @@ shared_ptr<Assets::AssetData> Assets::loadImage(AssetPath const& path) const {
       Image newImage = *source->image;
       path.directives.forEach([&](auto const& entry, Directives const&) {
         if (auto error = entry.operation.template ptr<ErrorImageOperation>())
-          std::rethrow_exception(error->exception);
+          if (auto string = error->cause.ptr<std::string>())
+            throw DirectivesException::format("ImageOperation parse error: {}", *string);
+          else
+            std::rethrow_exception(error->cause.get<std::exception_ptr>());
         else
           processImageOperation(entry.operation, newImage, [&](String const& ref) { return references.get(ref).get(); });
       });

source/core/StarAssetPath.cpp

@@ -160,7 +160,7 @@ std::ostream& operator<<(std::ostream& os, AssetPath const& rhs) {
     os << *rhs.subPath;
   }
 
-  rhs.directives.forEach([&](auto const& entry, Directives const& directives) {
+  rhs.directives.forEach([&](Directives::Entry const& entry, Directives const& directives) {
     os << "?";
     os << entry.string(*directives);
   });

source/core/StarDirectives.cpp

@@ -26,8 +26,10 @@ Directives::Entry::Entry(Entry const& other) {
 
 ImageOperation const& Directives::Entry::loadOperation(Shared const& parent) const {
   if (operation.is<NullImageOperation>()) {
-    try { operation = imageOperationFromString(string(parent)); }
-    catch (StarException const& e) { operation = ErrorImageOperation{ std::current_exception() }; }
+    try
+      { operation = imageOperationFromString(string(parent)); }
+    catch (StarException const& e)
+      { operation = ErrorImageOperation{std::exception_ptr()}; }
   }
   return operation;
 }
@@ -44,10 +46,9 @@ bool Directives::Shared::empty() const {
 
 Directives::Shared::Shared() {}
 
-Directives::Shared::Shared(List<Entry>&& givenEntries, String&& givenString, StringView givenPrefix) {
+Directives::Shared::Shared(List<Entry>&& givenEntries, String&& givenString) {
   entries = std::move(givenEntries);
   string = std::move(givenString);
-  prefix = givenPrefix;
   hash = string.empty() ? 0 : XXH3_64bits(string.utf8Ptr(), string.utf8Size());
 }
 
@@ -130,32 +131,25 @@ void Directives::parse(String&& directives) {
 
   List<Entry> entries;
   StringView view(directives);
-  StringView prefix = "";
   view.forEachSplitView("?", [&](StringView split, size_t beg, size_t end) {
     if (!split.empty()) {
-      if (beg == 0) {
-        try {
-          ImageOperation operation = imageOperationFromString(split);
-          entries.emplace_back(std::move(operation), beg, end);
-        }
-        catch (StarException const& e) {
-          prefix = split;
-          entries.emplace_back(ImageOperation(ErrorImageOperation{std::current_exception()}), beg, end);
-        }
-      }
-      else {
       ImageOperation operation = NullImageOperation();
-        entries.emplace_back(std::move(operation), beg, end);
+      if (beg == 0) {
+        try
+          { operation = imageOperationFromString(split); }
+        catch (StarException const& e)
+          { operation = ErrorImageOperation{std::exception_ptr()}; }
       }
+      entries.emplace_back(std::move(operation), beg, end);
     }
   });
 
-  if (entries.empty() && !prefix.empty()) {
+  if (entries.empty()) {
     m_shared.reset();
     return;
   }
 
-  m_shared = std::make_shared<Shared const>(std::move(entries), std::move(directives), prefix);
+  m_shared = std::make_shared<Shared const>(std::move(entries), std::move(directives));
   if (view.utf8().size() < 1000) { // Pre-load short enough directives
     for (auto& entry : m_shared->entries)
       entry.loadOperation(*m_shared);
@@ -169,13 +163,6 @@ String Directives::string() const {
     return m_shared->string;
 }
 
-StringView Directives::prefix() const {
-  if (!m_shared)
-    return "";
-  else
-    return m_shared->prefix;
-}
-
 String const* Directives::stringPtr() const {
   if (!m_shared)
     return nullptr;
@@ -186,9 +173,9 @@ String const* Directives::stringPtr() const {
 
 String Directives::buildString() const {
   if (m_shared) {
-    String built = m_shared->prefix;
-
+    String built;
     for (auto& entry : m_shared->entries) {
+      if (entry.begin > 0)
         built += "?";
       built += entry.string(*m_shared);
     }
@@ -332,14 +319,11 @@ String DirectivesGroup::toString() const {
 }
 
 void DirectivesGroup::addToString(String& string) const {
-  for (auto& directives : m_directives) {
-    if (directives) {
-      auto& dirString = directives->string;
-      if (!dirString.empty()) {
-        if (dirString.utf8().front() != '?')
-          string += "?";
-        string += dirString;
-      }
+  for (auto& entry : m_directives) {
+    if (entry && !entry->string.empty()) {
+      if (!string.empty() && string.utf8().back() != '?' && entry->string.utf8()[0] != '?')
+        string.append('?');
+      string += entry->string;
     }
   }
 }
@@ -376,7 +360,10 @@ void DirectivesGroup::applyExistingImage(Image& image) const {
   forEach([&](auto const& entry, Directives const& directives) {
     ImageOperation const& operation = entry.loadOperation(*directives);
     if (auto error = operation.ptr<ErrorImageOperation>())
-      std::rethrow_exception(error->exception);
+      if (auto string = error->cause.ptr<std::string>())
+        throw DirectivesException::format("ImageOperation parse error: {}", *string);
+      else
+        std::rethrow_exception(error->cause.get<std::exception_ptr>());
     else
       processImageOperation(operation, image);
   });

source/core/StarDirectives.hpp

@@ -31,13 +31,12 @@ public:
   struct Shared {
     List<Entry> entries;
     String string;
-    StringView prefix;
     size_t hash = 0;
     mutable Mutex mutex;
 
     bool empty() const;
     Shared();
-    Shared(List<Entry>&& givenEntries, String&& givenString, StringView givenPrefix);
+    Shared(List<Entry>&& givenEntries, String&& givenString);
   };
 
   Directives();
@@ -57,7 +56,6 @@ public:
   void loadOperations() const;
   void parse(String&& directives);
   String string() const;
-  StringView prefix() const;
   String const* stringPtr() const;
   String buildString() const;
   String& addToString(String& out) const;

source/core/StarImageProcessing.cpp

@@ -199,13 +199,11 @@ ImageOperation imageOperationFromString(StringView string) {
               hexDecode(hexPtr, 8, c, 4);
             }
             else if (!which || (ptr != end && ++ptr != end))
-                throw ImageOperationException(strf("Improper size for hex string '{}' in imageOperationFromString", StringView(hexPtr, hexLen)), false);
-            else // we're in A of A=B. In vanilla only A=B pairs are evaluated, so only throw an exception if B is also there.
+                return ErrorImageOperation{strf("Improper size for hex string '{}'", StringView(hexPtr, hexLen))};
+            else // we're in A of A=B. In vanilla only A=B pairs are evaluated, so only throw an error if B is also there.
                 return operation;
               
-
-            which = !which;
-            if (which)
+            if (which = !which)
               operation.colorReplaceMap[*(Vec4B*)&a] = *(Vec4B*)&b;
 
             hexLen = 0;
@@ -341,12 +339,12 @@ ImageOperation imageOperationFromString(StringView string) {
       return FlipImageOperation{FlipImageOperation::FlipXY};
 
     } else {
-      throw ImageOperationException(strf("Could not recognize ImageOperation type {}", type), false);
+      return NullImageOperation();
     }
   } catch (OutOfRangeException const& e) {
-    throw ImageOperationException("Error reading ImageOperation", e);
+    return ErrorImageOperation{std::exception_ptr()};
   } catch (BadLexicalCast const& e) {
-    throw ImageOperationException("Error reading ImageOperation", e);
+    return ErrorImageOperation{std::exception_ptr()};
   }
 }
 

source/core/StarImageProcessing.hpp

@@ -18,11 +18,11 @@ StringList colorDirectivesFromConfig(JsonArray const& directives);
 String paletteSwapDirectivesFromConfig(Json const& swaps);
 
 struct NullImageOperation {
-
+  bool unloaded = false;
 };
 
 struct ErrorImageOperation {
-  std::exception_ptr exception;
+  Variant<std::string, std::exception_ptr> cause;
 };
 
 struct HueShiftImageOperation {

source/rendering/StarFontTextureGroup.cpp

@@ -64,12 +64,17 @@ const FontTextureGroup::GlyphTexture& FontTextureGroup::glyphTexture(String::Cha
 
       for (auto& entry : directives->entries) {
         if (auto error = entry.operation.ptr<ErrorImageOperation>()) {
-          if (error->exception) {
+          if (auto string = error->cause.ptr<std::string>()) {
+            if (!string->empty()) {
+              Logger::error("Error parsing font directives: {}", *string);
+              string->clear();
+            }
+          } else if (auto& exception = error->cause.get<std::exception_ptr>()) {
             try
-              { std::rethrow_exception(error->exception); }
+              { std::rethrow_exception(error->cause.get<std::exception_ptr>()); }
             catch (std::exception const& e)
-              { Logger::error("Exception parsing font directives: {}", e.what()); }
-            error->exception = {};
+              { Logger::error("Exception parsing font directives: {}", e.what()); };
+            exception = {};
           }
           image.forEachPixel([](unsigned x, unsigned y, Vec4B& pixel) {
             pixel = ((x + y) % 2 == 0) ? Vec4B(255, 0, 255, pixel[3]) : Vec4B(0, 0, 0, pixel[3]);